Stump puller



mzsglszz. 1,440,008

C. B: soLpsmrH.

L STUMP FULLER.

FILED JULYv 18.. 1921.

3 sums-SHEET T INVENTOR.

By @Mw/MW A TTORNEY.

Patented Der, 2d, 1923. i*

STUlVlP FULLER.

Application llled .Tilly 18,

To (/,Z uf/10m t 'may ccm/"ern," l

Be it known that l, Liri reins GOLD- 'Zen ot the llnited States. and resident c i ix Francisco, 'euuty or San Francisco, and .State oi Ca nia, have invented a new and usei'ul Stump dulhzr.v oi' which the 'following a speciiication.

'lhe present invention relates to improveinents in stump pullers and its object is to provide a device of this character that concentrates an enormous power on the druni pulling the cable by means of which the stump is removed, is strong in its construem tion, can be made portable and easily handled by one man.

For reducing iny invention to practice l preferably use the mechanism illustratedin the accompanying drawing, in which Fig ure 1 represents a side elevation of my stump puller, igure 2 a plan view of the saine, Figure 3 a detail plan 1view oic a portion of the device, illustrating the gearing through which power is transmitted to the druin, and Figure d a side elevation of the device shown in Figure 3. l

Referring to the drawing in detail, it will be noted that the outstanding feature of iny device is the heavy arched traine (1) rest ing on two horiaaontal shafts (2) and which latter are supported in the standards (il) and (6) bolted to the bed (T) oli the truck (8), of which the wheels (9) are shown in the drawing. This arched traine consists of two parallel members (17) and (18) and serves as a guide tor two endless chains (11), which pass over sprocket wheels (12) secured on the shaft (2), sprocket wheels (111) secured on the shaft (3), and a plurality oi sprocket wheels (15) supported on transverse shafts (16) extendingin two arched rows betweenthe two members (17) and (18) of the traine (l). It will be seen that in this manner, when the sprocket wheels (12) are rotated, each link of the endless chains passes around these wheels, over the upper arched rows of sprocket wheels (15), aroundthe sprocket wheels (14) and over the lower arched rows of sprocket wheels back to the sprockets (12). T he latter are on the saine shaft with gear wheels (19), which latter receive rotary inotion from pinions (Q1) secured to the drive shaft (22). p

Centrally between the two shafts (2) and (3) a third shaft is provided parallel 1921. Serial No. 185,567.

withthe saine. T he latter shaft is trans- 7verse/ly divided into two parts (24) and (see igure and carries looselivv the disc1 (27) at the joint. This disc is opera tively connected with two corresponding links (28) oi the endless chains throuoh an arrn (29), which is adapted to be indici-ted into a radial recess (31) in the disc, and a link (3:2) pivotally secured to the end of the arm and the link The arin is long `enough to extend 'roin the disc to a point located `substantially centrally with reference to thepath of the endless chains so that it can always follow the motionsy of the connecting link. Starting from the position shown in Figure 1, it will be readily `seen that when the chain, and with it the link (2S), moves the arni inoves with it until the nnlr reaches the lowest pointon its ydownward. travel, when the arin will come to rest until the link has travelled upward again through a certain distance. Then it will pull the arin in the opposite direction until the opposite sprocket wheel has been p reached, when the arin again will be turned. rllhns the arrn `will swing hacl: and forth end cause thedisc to go through-the saine rnotions. The discis provided on either side with a pawl (33) and (34;) (-see Figure 3) pointing in opposite directions. The pawl ($33) is adapted to engage a ratchet wheel (BG) keyed to the shaftuel), which latter also carries the pinion (37) and through it and the gear wheel transinits rotary 'motion to the shaft (89) having the drum (1l-1) rigidly secured thereto.

The pawl (see Figure Ll) actuates the ratchet wheel and through it the shaft (2G) so that the latter turns in a direction oppositeto that of the shaft (24;). ls rotary motion is 'transmitted to the shaft (39) through the wheels and and an idler (4G) is interposed between the two wheels to reverse the direction so that tion by both pawls.

lt will be seen that in this manner the arm and its supporting member are rocked.v

2. In a device of the character described, mounting means for an endless chain coAL )rising two rotatably mounted end members and two rovi/*sof guiding members arranged in arched formation relative to the end members. i

3. In a device of the character described, mounting means for an endless chain comprising t-wo parallel supporting shafts having sprocket wheels mounted thereon and a trame mounted over the shafts havingtwo archedV rows of 'sprocket wheels securedl thereto, all the sprocket wheels being in one plane.`

ll. A driving mechanism ior a device of the character described comprising an axially supported member having a radial arm thereon, guiding members arranged in arch formation mounted over the same having endless chains thereon, an operative connection between the arm and corresponding links of the chain, means for imparting motion to the endless chains whereby the arm and lits supporting member are rocked, a driven element, and means for transmitting uni-directional rotary motion to the same from the rocking member.

5. A driving mechanism toil a device ot the character described comprising an axially supported 'member having a radial arm thereon, arched iii-aine membersl supported over the said member having a plurality of sprocket wheels mounted therein in arch formation, anv endless chain engaging the same, an operative connection between the arm and a corresponding link oi the chain, means for imparting motion to the endless chains whereby the and its supporting member are rocked, a driven element, and neans for transmitting uni-directional rotary motion to the same from the rocking member.

6. i driving mechanism tor a device ot the character 4described comprising an axially supported member having a radial arm thereon, arched frame members supported over the saine having a plurality of sprocket wheels mounted therein in arch formation, an endless chain engaging the same, an operative connection between the arm and a corresponding link oi the chain, means for imparting motion to the endless chain whereby the arm and its supporting meinber are vroclred, a ratchet wheel supported on either side ot the said member, a pawl on either face of the saine adapted to engage one oi' the ratchet wheels whereby the two ratchets are intermittently rotated in opposite directions, a `driveny element, and means for transmitting uni-directional rotary motion to the same from the ratchets.

@nannies B. Gonnsiviirii. 

